Finding the Fourth Proportional to 139,380.81, 209,079.15 and 39,533.15

Step by Step Solution

1. Step 1: Write the proportion equation
   139,380.81 : 209,079.15 = 39,533.15 : x
2. Step 2: Convert to fraction form
   139,380.81/209,079.15 = 39,533.15/x
3. Step 3: Cross multiply
   139,380.81x = 209,079.15 × 39,533.15
4. Step 4: Simplify right side
   139,380.81x = 8,265,557,995.65
5. Step 5: Solve for x
   x = 8,265,557,995.65/139,380.81
6. Step 6: Final answer
   x = 59,301.98